Half to fred



(No Model.)

W.. A. CHASE.

INDICATOR FOR LAMPS, L'ANTERNS, m. No. 396.540. Patented Jan. 22, 1889.

w i/bvwweo UNITED STATES PATENT QFFICE.

VILLIAM ALONZO CHASE, OF MORRISVILLE, VERMONT, ASSIGNOR OF ONE- IIALF TOFRED. B. LIVINGSTON, OF SAME PLACE.

INDICATOR FOR LAMPS, LANTERNS, 84.0.

SPECIFICATION forming part of Letters Patent No. 396,540, dated January22, 1889. Application filed March 21, 1887. Serial No. 231,724. (Nomodel.)

To all whom, it may concern:

Be it known that I, XVILLIAM ALONZO CHASE, a citizen of the UnitedStates, residing at Morrisville, in the county of Lamoille and State ofVermont, have invented certain new and useful Improvements in Indicatorsfor Lamps, Lanterns, &c., of which the following is a specification.

My invention relates to improvements in devices for indicating when anopaque lamp or other receptacle has been filled with liquid; and itconsists in certain novel features, hereinafter described and claimed.

In the accompanying drawings, which fully illustrate my invention,Figure 1 is a vertical central sectional view of a lamp provided with myimprovement. Fig. 2 is a perspec tive view of the perforated cylinder,and Fig. 3 is a vertical section of the same.

My IDX'GDEIOII is designed especially for application to lampsalready'in use and of any and all designs.

In the annexed drawings, A indicates the body of a lamp having thefeed-opening B in its top side, through which the oil is poured into thereservoir.

0 designates a tube or cylinder made of perforated material and having aclosed lower end and an open upper end. The open upper end of the tubeor cylinder is provided with the exterior screw-threads, G, by means ofwhich it is secured in the feed-opening B.

\Vithin the perforated cylinder or tube I place a float, E, which isformed in the shape 3 5 of a six-pointed cubical cross, of cork, lightwood, or other material which will float on the illuminating-fluid. Thisfloat is also coated with luminous paint, in order that it may be seenin the dark.

From the foregoing description, taken in connection with theaccompanying drawings, it is thought the operation of the device will beobvious. The illuminating-fluid is poured through the feed-opening inthe usual manner, and passes into the cylinder and through 5 theperforations therein into the reservoir or body of the lamp. As the oilrises the float will be carried upward, and when the lamp is full theupper point of the float will project through the feed-opening andnotify the 'person using the lamp that a sufficient quantity of oil hasbeen placed therein, as will be readily understood 011 reference toFigs. 1 and 3. I find that this form, while moving freely within thecylinder 1, floats higher 5 5 upon the oil than other forms ordispositions of the material of the float, and always presents aluminous point upward.

It will be seen that I have provided a very simple and efficientindicating device which can be readily applied to any style of lamp, andwhich can be manufactured and sold at a trifling cost.

I am aware that indicators have heretofore been provided for lamps; butI donotclaim such a device, broadly.

' Having thus described myinvention, what I claim, and desire to secureby Letters Patent, 1s

The herein-described indicator for lamps, consisting of a perforatedcylinder or tube having a closed lower end and an open exteriorlyscrew-threaded upper end, and a luminous float within said cylinder inthe form of a six-pointed cubical cross, substantially as specified.

In testimony that I claim the foregoing as my own I have hereuntoaffixed my signature in presence of two witnesses.

'IVILLIAM ALONZO CHASE.

'Witnesses;

JAMES C. ROBINSON, ASAHEL M. BURKE.

